Sash lock securing device



Dec. 28, 1937. H. H. KlsTNER SASH LOCK SECURING DEVICE Filed Feb. 23, 1937 alle fie/man H Karine/L Patented Dec. 28, 1937 UNITED STATES PATENT OFFICE y SASH LOOK SECURJNG DEVICE Herman H. Kistner, Baltimore, Md., assignor to Kistner Lock & Appliance Company, a corporation of Maryland Application February 23, 1937, Serial No. 127,225

3 Claims.

vwhich can be readily stamped and formed to the' Fig. 1 is a perspective View of a preferred formy of split sleeve;

Fig. 2 is an axial section thereof on the Vline 2-2 in Fig. 1; y

Fig. 3 is a similar view showing the sleeve after expanding it into a window sash ready to receive the bolt assembly, the shell only of the bolt assembly being shown in place;

Fig. 4 is a perspective view of a lock bolt assembled in its shell;

Fig. 5 is a transverse section of the sleeve on the line 5-5 in Fig. 2; and

Fig. 6 is a cross-section through the meeting rail of a double hung window, showing the invention assembled in place with a lock barrel and plunger of the type which is adapted to be' se- Y cured thereby.

Referring to the drawing, the bolt lock shown in Figs. 4 and 6 comprises a slidable bolt II housed in a cylindrical barrel or shell I2, which is pressed into the bore of the inner sash and pinned, or may be secured merely by friction between the outer surface of the lock barrel and the wall of the bore in the wood. The bolt may be operated by means of a key (not shown) which enters the open inner end of the barrel to engage the bolt, as illustrated in my pending applications Ser. Nos. 605,729 and 41,115, for example.

In the present invention, a suitably shaped split sleeve I3, is placed in the bore in the sash between the shell or barrel I2 and the wood to snugly engage both. This sleeve is preferably provided with protuberances I4 which are forced into the wood by expansion of the sleeve when the bolt barrel is inserted, as shown in Fig. 6.

The split sleeve I3 is also provided with spring prongs I5 on opposite sides of its side walls, which are adapted to flex outwards to permit the lock barrel to pass between them. The tips of these spring prongs are bent outwards to engage and 60 sink into the wood when forced apart. Near the tips of the spring prongs are points I6, facing inwards, which are adapted to spring back sufficiently to engage in notches I1 in the opposite sides of the lock barrel in the assembled position of the parts.

The dimensions of the split sleeve and lock barrel are made to correspond with the size of the bore in the sash, so that when the parts are assembled in place they will t tightly, and the protuberances I4 and prongs I5 will hold the sleeve l securely in place regardless of slight shrinking and swelling of the wood due to changesr in weather and temperature conditions.

The shape of the points I6 and'notches I I is such as to prevent the barrel I2 from being Vforced back out of the sash by driving in the end of the.

bolt when locked in bolting position without shearing off the prongs, and this would require more force than can be exerted without breaking the sash. The lock barrel andr sleeve has no flanges or other projecting portions which might offer a means of prying them out of the sash.

The bolt barrel may readily be removed from the sleeve I3 when the lower sash is raised to expose'the end of the bolt by driving it through from the inside, as the points I6 do not interfere with movement of the bolt barrel toward the outside of the sash. Upon removal of the bolt barrel, the split sleeve I3 may be collapsed sulliciently to permit it to be driven out also.

What I claim and desire to secure by Letters Patent is as follows:

1. A sash lock securing device comprising a split sleeve conformable to a bore in thesash and adapted to receive a bolt barrel, said sleeve having a portion adapted to engage a recess in said barrel to retain it in position when assembled therein, a portion of said sleeve also engaging the side wall of the bore to secure the sleeve and barrel in place.

2. A sash lock securing device comprising a longitudinally split cylindrical sleeve conformable to a bore in the sash and adapted to receive a bolt barrel, said sleeve having a flexible sidewall portion adapted to engage a recess in said barrel and to engage the side wall of the bore to bite into the side wall of the bore to retain it in position when expanded by the insertion of the barrel.

3. A sash lock for double hung windows comprising a cylindrical barrel having a shoulder and a sliding bolt mounted therein, a split sleeve of flexible metal for encompassing said barrel and adapted to fit snugly in a bore in the Window sash, and means on said -sleeve adapted to be expanded by the barrel for engaging said bore and said shoulder to secure the lock in place when assembled in operative position.

HERMAN I-I. KISTNER. 

